Indoor single-phase epoxy resin casting current transformer complying with GB/T20840.1/2、IEC61869-1/2 and JB/T8510.1-2007 standards; rated insulation level 31.5/95/185kV, rated frequency 50/60Hz, rated secondary current 5A or 1A. Optional primary current covers 10-2000A; accuracy-class rated outputs range 10-60VA for grades 0.2S,0.5S,0.2,0.5,5P10,5P15,5P20; short-time thermal current ranges 15-100kA, rated dynamic stable current ranges 37.5-200kA; product weight:85kg; ambient operating temperature -5℃~+40℃.
LZZB-27.5 is a 27.5kV indoor epoxy cast current transformer, suitable for medium voltage switchgear applications. It is not for outdoor or high voltage transmission use.
| Paramètre | Spécification | Vérification |
|---|---|---|
| Type de produit | Current Transformer | [On Request] |
| Code modèle | LZZB-27.5 | Marquage de la plaque constructeur |
| Tension primaire | 10kV | Essai de tension nominale (IEC 61869-1/3) |
| Tension secondaire | 5A/1A | Vérification du rapport à la fréquence nominale |
| Classe de précision | [On Request] | Essai de précision (IEC 61869-2 / IEEE C57.13) |
| Charge nominale | [On Request] | Essai de charge à la puissance VA nominale |
| Type d'isolement | Dry Epoxy Resin | Essais diélectriques selon la norme |
| Niveau d'isolement (BIL) | 12/42/75kV | Tenue à fréquence industrielle et au choc de foudre |
| Normes | [On Request] | Certifié selon les normes listées |
| Fréquence | 50/60Hz | Selon IEC 61869-1 |
| Environnement | Ambient: -5℃~+40℃ | Selon les limites de la fiche technique |
Idéal pour
Non recommandé pour
Connect primary terminals in series with the line. Secondary terminals are 1S1 and 1S2 for the main winding; if a protection winding is present, use 2S1 and 2S2. Never open-circuit the secondary of a CT while energized - hazardous voltage. Ground the secondary winding at one point. Ensure correct polarity for metering and protection.
Conforme à : [On Request]
S_total = ΣS_instrument + I₂² × (ρ × 2L / A)
Q : What is the insulation level of this CT?
R : The insulation level is 12/42/75kV, meaning 12kV system voltage, 42kV power-frequency withstand, and 75kV lightning impulse withstand.
Q : What secondary currents are available?
R : The secondary current can be 5A or 1A.
Q : What accuracy classes are offered?
R : Accuracy classes include 0.2S, 0.5S, 0.2, 0.5, 5P10, 5P15, and 5P20.
Les champs manquants sont marqués [On Request] — jamais inventés. Les lignes de vérification M2/M5/M6 suivent les conventions IEC 61869 / IEEE C57.13.
| Rated primary current I1n (A) | Accuracy classCombined | Accuracy class & rated output (VA)COSφ=0.5 | Short-time thermal current Ith (kA/S) | Rated dynamic current Idyn (kA) | Weight (kg) |
|---|---|---|---|---|---|
| 10-50 | 0.2(S)/0.2(S) 0.2(S)/0.5(S) 0.2(S)/5P 0.5(S)/5P | 10 10 15 20 50 30 20 | 150 1in | 375 1in | 85 |
| 75 | 0.2(S)/0.2(S) 0.2(S)/0.5(S) 0.2(S)/5P 0.5(S)/5P | 10 10 15 20 50 30 20 | 15 | 37.5 | 85 |
| 100 | 0.2(S)/0.2(S) 0.2(S)/0.5(S) 0.2(S)/5P 0.5(S)/5P | 10 10 15 20 50 30 20 | 25 | 75 | 85 |
| 150 | 0.2(S)/0.2(S) 0.2(S)/0.5(S) 0.2(S)/5P 0.5(S)/5P | 10 10 15 20 50 30 20 | 31.5 | 80 | 85 |
| 200-250 | 0.2(S)/0.2(S) 0.2(S)/0.5(S) 0.2(S)/5P 0.5(S)/5P | 10 10 15 20 50 30 20 | 45 | 112.5 | 85 |
| 300-500 | 0.2(S)/0.2(S) 0.2(S)/0.5(S) 0.2(S)/5P 0.5(S)/5P | 10 10 15 20 50 30 20 | 50 | 125 | 85 |
| 600-630 | 0.2(S)/0.2(S) 0.2(S)/0.5(S) 0.2(S)/5P 0.5(S)/5P | 10 10 15 20 50 30 20 | 63 | 130 | 85 |
| 750-1000 | 0.2(S)/0.2(S) 0.2(S)/0.5(S) 0.2(S)/5P 0.5(S)/5P | 15 15 20 30 60 40 30 | 80 | 180 | 85 |
| 1200-2000 | 0.2(S)/0.2(S) 0.2(S)/0.5(S) 0.2(S)/5P 0.5(S)/5P | 15 15 20 30 60 40 30 | 100 | 200 | 85 |
Dessin d'encombrement et de dimensions du LZZB-27.5 — cliquez sur l'image pour zoomer / afficher l'original.
